It's a 2011 film and as the title suggests it's about an 'Hefalump called Rosie acted by an elephant really called Tai.
Written by Sara Gruen mother of three children.
http://www.imdb.com/title/tt1067583/?ref_=nv_sr_1
"Gruen is an animal lover; both her first novel, Riding Lessons, and her second novel, Flying Changes, involve horses. Gruen's third book, the 1930s circus drama Water for Elephants, was initially turned down by her publisher at the time, Avon Books, forcing Gruen to find another publisher. It went on to become a New York Times bestseller and is now available in 44 languages. Ref Wiki.
I must say I was pleasantly surprised as having never heard of it before. Very engaging must read the book...
Girls will love it, romance elephants ect.....
Ps: Tai (rosie) is only credited with one film this. so a short film career.